Скачать или смотреть IB High School Math Tips #81

IB Math Tip 📘 | Probability in MCQ Questions

An MCQ has 4 options: A, B, C, D.
If you guess randomly, what is the probability of getting the answer WRONG?

Key idea:
👉 Probability = (number of wrong outcomes) / (total outcomes)

Here:
• Total options = 4
• Wrong options = 3

So,
P(wrong) = 3/4 = 75%

This is useful for:
• IB & IGCSE exams
• Understanding risk when guessing
• Probability fundamentals

Perfect for:
• Grade 9–10 students
• High school math learners
• Exam strategy awareness

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